My understanding is that in a simple passive RC low pass filter, the high frequency noise will just go to ground while the low frequency signal will go through the resistor only. My question is what happens to the high frequency signal in the below active low pass filter?
The capacitor is not connected to ground, so where does the high frequency signal go?
I mean in theory, the inverting input is technically connected to ground since the op amp will do what it can to make the difference in voltage between both inputs to be zero, but what about if it was a differential amplifier?
in that case, the inverting input will not be at ground, so where does the high frequency signal go?